component
ATMEGA16U2-MU
Public Made by Adomby adom
Microchip Tech ATMEL & AVR, QFN-32-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"slug": "atmega16u2-mu",
"version": "0.1.0",
"type": "component",
"description": "Microchip Tech ATMEL & AVR, QFN-32-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
"component",
"embedded processors & controllers",
"atmega16u2-mu",
"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"atmega16u2-mu.kicad_sym",
"atmega16u2-mu.kicad_mod",
"atmega16u2-mu.glb",
"atmega16u2-mu.step",
"atmega16u2-mu.lbr",
"docs/hero.png",
"docs/atmega16u2-mu-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"atmega16u2-mu-hero.glb",
"atmega16u2-mu-hero.overlay.json",
"atmega16u2-mu-etched.glb"
],
"component": {
"mpn": "ATMEGA16U2-MU",
"manufacturer": "Microchip Tech",
"package": "QFN-32-EP(5x5)",
"pin_count": 33,
"category": "Embedded Processors & Controllers",
"subcategory": "ATMEL & AVR",
"datasheet": "https://ww1.microchip.com/downloads/en/DeviceDoc/doc7799.pdf",
"parts": {
"symbol": "atmega16u2-mu.kicad_sym",
"footprint": "atmega16u2-mu.kicad_mod",
"model_3d": "atmega16u2-mu-hero.glb",
"model_3d_plain": "atmega16u2-mu-etched.glb",
"model_3d_step": "atmega16u2-mu-etched.step",
"model_3d_step_plain": "atmega16u2-mu.step",
"lbr": "atmega16u2-mu.lbr"
},
"distributor_links": {
"lcsc": "C17317",
"digikey": "ATMEGA16U2-MU-ND",
"mouser": "556-ATMEGA16U2-MU"
},
"distributor_check": {
"checked_at": "2026-10-28T00:48:34Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "ATMEGA16U2-MU-ND",
"status": "found"
},
"mouser": {
"pn": "556-ATMEGA16U2-MU",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "XTAL1",
"type": "input",
"description": "Input to the inverting oscillator amplifier and input to the internal clock operating circuit."
},
{
"number": "2",
"name": "XTAL2/PC0",
"type": "bidirectional",
"description": "Output from the inverting oscillator amplifier if enabled by fuse, also serves as generic I/O PC0."
},
{
"number": "3",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "4",
"name": "VCC",
"type": "power_in",
"description": "Digital supply voltage (2.7 - 5.5V operating range)."
},
{
"number": "5",
"name": "PC2",
"type": "bidirectional",
"description": "Port C bit 2 bi-directional I/O with internal pull-up, alternate function PCINT11 pin change interrupt (also marked AIN2 in the pinout)."
},
{
"number": "6",
"name": "PD0",
"type": "bidirectional",
"description": "Port D bit 0 bi-directional I/O with internal pull-up, alternate functions INT0 external interrupt and OC0B Timer/Counter0 output compare B."
},
{
"number": "7",
"name": "PD1",
"type": "bidirectional",
"description": "Port D bit 1 bi-directional I/O with internal pull-up, alternate functions INT1 external interrupt and AIN0 analog comparator positive input."
},
{
"number": "8",
"name": "PD2",
"type": "bidirectional",
"description": "Port D bit 2 bi-directional I/O with internal pull-up, alternate functions INT2, AIN1 analog comparator negative input and RXD1 USART1 receive data."
},
{
"number": "9",
"name": "PD3",
"type": "bidirectional",
"description": "Port D bit 3 bi-directional I/O with internal pull-up, alternate functions INT3 external interrupt and TXD1 USART1 transmit data."
},
{
"number": "10",
"name": "PD4",
"type": "bidirectional",
"description": "Port D bit 4 bi-directional I/O with internal pull-up, alternate function INT5 external interrupt (also marked AIN3 in the pinout)."
},
{
"number": "11",
"name": "PD5",
"type": "bidirectional",
"description": "Port D bit 5 bi-directional I/O with internal pull-up, alternate functions XCK1 USART1 external clock and PCINT12 pin change interrupt (also marked AIN4 in the pinout)."
},
{
"number": "12",
"name": "PD6",
"type": "bidirectional",
"description": "Port D bit 6 bi-directional I/O with internal pull-up, alternate functions INT6 external interrupt and RTS USART1 receiver flow control (also marked AIN5 in the pinout)."
},
{
"number": "13",
"name": "PD7",
"type": "bidirectional",
"description": "Port D bit 7 bi-directional I/O with internal pull-up, alternate functions HWB hardware boot, T0 Timer/Counter0 clock source, INT7 external interrupt and CTS USART1 transmitter flow control (also marked AIN6 in the pinout)."
},
{
"number": "14",
"name": "PB0",
"type": "bidirectional",
"description": "Port B bit 0 bi-directional I/O with internal pull-up, alternate functions SS SPI slave select input and PCINT0 pin change interrupt."
},
{
"number": "15",
"name": "PB1",
"type": "bidirectional",
"description": "Port B bit 1 bi-directional I/O with internal pull-up, alternate functions SCLK SPI serial clock (also serial programming clock) and PCINT1 pin change interrupt."
},
{
"number": "16",
"name": "PB2",
"type": "bidirectional",
"description": "Port B bit 2 bi-directional I/O with internal pull-up, alternate functions PDI serial programming data input, MOSI SPI data and PCINT2 pin change interrupt."
},
{
"number": "17",
"name": "PB3",
"type": "bidirectional",
"description": "Port B bit 3 bi-directional I/O with internal pull-up, alternate functions PDO serial programming data output, MISO SPI data and PCINT3 pin change interrupt."
},
{
"number": "18",
"name": "PB4",
"type": "bidirectional",
"description": "Port B bit 4 bi-directional I/O with internal pull-up, alternate functions T1 Timer/Counter1 clock source and PCINT4 pin change interrupt."
},
{
"number": "19",
"name": "PB5",
"type": "bidirectional",
"description": "Port B bit 5 bi-directional I/O with internal pull-up, alternate function PCINT5 pin change interrupt."
},
{
"number": "20",
"name": "PB6",
"type": "bidirectional",
"description": "Port B bit 6 bi-directional I/O with internal pull-up, alternate function PCINT6 pin change interrupt."
},
{
"number": "21",
"name": "PB7",
"type": "bidirectional",
"description": "Port B bit 7 bi-directional I/O with internal pull-up, alternate functions OC0A, OC1C output compare outputs and PCINT7 pin change interrupt."
},
{
"number": "22",
"name": "PC7",
"type": "bidirectional",
"description": "Port C bit 7 bi-directional I/O with internal pull-up, alternate functions ICP1 input capture, INT4 external interrupt and CLKO clock output if enabled by fuse."
},
{
"number": "23",
"name": "PC6",
"type": "bidirectional",
"description": "Port C bit 6 bi-directional I/O with internal pull-up, alternate functions OC1A output compare A and PCINT8 pin change interrupt."
},
{
"number": "24",
"name": "RESET/PC1/dW",
"type": "bidirectional",
"description": "Active-low reset input (a low level longer than the minimum pulse length generates a reset), alternatively debugWIRE channel or generic I/O depending on fuses RSTDISBL and DWEN."
},
{
"number": "25",
"name": "PC5",
"type": "bidirectional",
"description": "Port C bit 5 bi-directional I/O with internal pull-up, alternate functions OC1B output compare B and PCINT9 pin change interrupt."
},
{
"number": "26",
"name": "PC4",
"type": "bidirectional",
"description": "Port C bit 4 bi-directional I/O with internal pull-up, alternate function PCINT10 pin change interrupt."
},
{
"number": "27",
"name": "UCAP",
"type": "power_out",
"description": "USB pads internal regulator output supply voltage, to be connected to an external 1 µF capacitor."
},
{
"number": "28",
"name": "UGND",
"type": "power_in",
"description": "USB ground."
},
{
"number": "29",
"name": "D+",
"type": "bidirectional",
"description": "USB full speed positive data upstream port."
},
{
"number": "30",
"name": "D-",
"type": "bidirectional",
"description": "USB full speed negative data upstream port."
},
{
"number": "31",
"name": "UVCC",
"type": "power_in",
"description": "USB pads internal regulator input supply voltage."
},
{
"number": "32",
"name": "AVCC",
"type": "power_in",
"description": "Supply voltage input for all analog features (analog comparator, PLL), to be externally connected to VCC through a low-pass filter."
},
{
"number": "33",
"name": "EP",
"type": "power_in",
"description": "Large center pad underneath the QFN package, to be soldered to ground on the board for good mechanical stability."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
"factory": "2.0.0",
"extractor": "extract_pins 0.3",
"primary_model": "claude-sonnet-5-5",
"primary_mode": "text+vision",
"consensus_model": "claude-opus-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: The exposed center pad has no printed pin number. Pin '33' is a conventional number I assigned. The ; The datasheet gives no electrical limits (voltage or current) for individual pins, so descriptions s",
"vision extraction: provenance cannot be text-verified; needs consensus"
],
"pages_sent": 44,
"cost_usd": 0.1698,
"at": "2026-10-28T00:47:56"
},
"datasheet": {
"url": "https://ww1.microchip.com/downloads/en/DeviceDoc/doc7799.pdf",
"pages": 310,
"sha256": "182d44b383463202",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 33,
"described": 33,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
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"file": "atmega16u2-mu.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
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],
"zmin_mm": 0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "5fa713ea46b36980895812ed853577889b7cb06d275041a39b99bc0be305dc79",
"checked": "2026-10-28",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "atmega16u2-mu-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
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"zmin_mm": 0.0,
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"footprint_binding": "identity",
"sha256": "3a4978c126303df03f0321c8cba40872e890255333391ece86c4567e708d3bfb",
"checked": "2026-10-28",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
}
}